Gustav lentz



(No'ModeL) G. LENTZ. BOGIE FRAME FOR LOGOMOTIVE ENGINES. No. 487,187

Patented Nov. 29, 1892.

' .UNTTED STATES PATENT OFFICE.

GUSTAV LENTZ, OF DUSSELDORF, GERMANY.

BOGlE-FRAME FOR LOCOMOTlVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 487,187, dated November 29, 1892. Application filed June 18,1892. Serial No. 437,139- (No model.) Patented in Germany December 29, 1891 No. 65,219.

To all whom it may concern:

Be it known that I, GUSTAV LENTZ, civil engineer, a citizen of Prussia, residing at 18 Uhlandstrasse, Dusseldorf, in the German Em pire, have invented a certain new and useful Bogie-Frame for Locomotive-Engines, (for which I have obtained Letters Patent in Germany, dated December 29, 1891, No. 65,219,) of which the following is a specification.

Theloogie-frames with one or more axles and radial axle-boxes heretofore used for 10- comotive-engines for effecting the correct angling of the wheel-axles on curves cannot always be employed, on the one hand, on account of their complicated and expensive construction and, on the other hand, because there is no room for the necessary radius-arm between the frames, as the available room is taken up by the cylinders slide-chest or the fire-box.

My present invention has for its object an improved construction which obviates the said difficulties and combines great simplicity of construction with capability of general adoption.

The general principle involved in this construction consists in supporting the main frame of the engine upon the bogie-frame by means of shafts mounted on the frame, and of pendulous devices or connecting-pieces carried by such shafts and connected to the main frame.

The accompanying drawings show, by way of example, some of the various modes of constructing the improved bogie-frame according to this system.

Figure 1 shows a longitudinal section of a bogie-frame; Fig. 3, a plan; Figs. 2 and 4, sections taken, respectively, on lines A B and O D, Fig. 1. Figs. 5 to 15 show diagram views of several modifications to a smaller scale.

w w are two horizontal shafts inclined to the center line of the engine at such an angle as to intersect such line at the theoretical center 0, Fig. 3, which corresponds to the center of the arc of the radial axle-box or the center of rotation of the radius-arm. The suspension-links or connecting-pieces 0, cl, 6, and f, attached to the shafts w w, are shown in slanting positions in the cross-sections at Figs. 2 and 4:, so that the lower ends thereof are situated farther outward than the upper ends, and they thus tend to keep the bogie-frame in the middle position. fixed to transverse connectingplates of the main framing arc, are in the example shown carried by the lower ends of the suspensionlinks 0 d e f. The same principle of construction is equally applicable to bogie-frames with two or four wheels.

Fig. 5 shows a back end View, Fig.6 a side view, Fig. 7 a front end view, and Fig. 8 a plan of an arrangement of shafts w that are mounted upon the four-wheeled bogie-frame at an inclination to the horizontal plane. The suspension-links q are directed upward and support the main frame at the points 19. In the side View, Fig. 6, the links q are shown arranged parallel to each other, while the center lines of the links q converge toward each other in the upward direction in the two end views, Figs. 5 and 7. The center of rotation 0 is shown situated in the horizontal plane of the points of support Figs. 9, 10, and 11 show, respectively, a back end view, a side view, and a front end view in which the shafts w are also placed at an inclination to the horizontal plane the center of rotation 0 of which lies in the horizontal plane of the lower ends pof the links g, which in this case are directed downward. The shafts w are in this case carried upon the top of the bogie-frame, the main frame being carried by the lower ends 19 of the links q. The links q are in this case directed outward from their connection with the shaft both in the side view, Fig. 10, and in the end views, Figs. 9 and 11.

Figs. 13, 14, and 15 show, respectively, back end view, side View, and front end view of an arrangement in which the shafts w are mounted in a horizontal plane on the under side of the bogie-frame, the links q being directed upward and connected to the main frame at p p.

The plans shown at Figs. 3, 8, and 12 apply equally to all the arrangements described.

It will be readily understood from the foregoing description that by the angular arrangement of the shafts wand the connection of the bogie-frame to the main frame by the links q in the manner described any lateral displacement of the bogie-frame when running on a curve will always take place in a circular arc the center of which corresponds to The brackets g h z' 70,

end is connected to the main frame of the en gine.

In testimony whereof I have signed my name to this specification, in the presence of IS two subscribing Witnesses, this 31st day of May, A. D. 1892.

GUSTAV LENTZ.

center line of the engine, in combination with Witnesses: links or connecting-pieces, one end of which D; J. PARTELLO, is connected to the said shafts, while the other WV. OTTO. 

